"I installed a set of these Champions after 6 of 8 OE plugs broke off in head. I have about 5K miles on my Champions and I can't find any fault with them. Runs as good if not better than my old Motorcraft plugs. Increased throttle response, easy starts, smooth idle, engine pulls hard all the way to red line. I highly recommend."posted by: Jim on August 4, 2008view all 1 reviews